US10712755B2 - Linear solenoid valve - Google Patents

Linear solenoid valve Download PDF

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Publication number
US10712755B2
US10712755B2 US16/317,020 US201716317020A US10712755B2 US 10712755 B2 US10712755 B2 US 10712755B2 US 201716317020 A US201716317020 A US 201716317020A US 10712755 B2 US10712755 B2 US 10712755B2
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United States
Prior art keywords
command value
current
spool
oscillation frequency
pressure
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US16/317,020
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US20190227579A1 (en
Inventor
Hideki Ishii
Yoshinori Ishimori
Yutaka Hirose
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JATCO Ltd
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JATCO Ltd
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Assigned to JATCO LTD reassignment JATCO LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HIROSE, YUTAKA, ISHII, HIDEKI, ISHIMORI, YOSHINORI
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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/2022—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means actuated by a proportional solenoid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
    • F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
    • F16H61/0251—Elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K29/00—Arrangements for movement of valve members other than for opening and closing the valve, e.g. for grinding-in, for preventing sticking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
    • F16H2061/1256—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected
    • F16H2061/126—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected the failing part is the controller
    • F16H2061/1268—Electric parts of the controller, e.g. a defect solenoid, wiring or microprocessor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/4238—With cleaner, lubrication added to fluid or liquid sealing at valve interface
    • Y10T137/4245—Cleaning or steam sterilizing
    • Y10T137/4273—Mechanical cleaning
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/4238—With cleaner, lubrication added to fluid or liquid sealing at valve interface
    • Y10T137/4245—Cleaning or steam sterilizing
    • Y10T137/4273—Mechanical cleaning
    • Y10T137/428—Valve grinding motion of valve on seat

Definitions

  • the present invention relates to a linear solenoid valve.
  • a patent document 1 discloses a two-way linear solenoid valve used in a hydraulic control circuit of an automatic transmission.
  • This two-way linear solenoid valve is configured to control the opening amount of a pressure adjusting port communicating with a hydraulic circuit by the forward and backward movement in the axis direction of a spool.
  • This control of the opening amount of the pressure adjusting port to adjust the amount of oil flowing into a drain port from the pressure adjusting port, the oil pressure on a hydraulic circuit side is adjusted.
  • foreign substances for example, sludge
  • the movement of the spool is inhibited by the foreign substances, and the oil pressure cannot be appropriately adjusted.
  • a control device of this type of the linear solenoid valve is configured to execute the removing of the deposited foreign substances by operating (hereinafter, also referred to as a foreign substance removing operation) the spool in a predetermined mode, when the reduction of the oil pressure caused by the deposited foreign substances is determined.
  • the control device sets the opening of the pressure adjusting port to be large for a predetermined time by maintaining the excitation current of the solenoid at a preset maximum valve and minimum value by every predetermined time. At this time, the flow amount of the oil discharged from the pressure adjusting port to the drain port increases, and the deposited foreign substances are discharged from the drain port together with the oil.
  • Patent Document 1 Japanese Patent Application Publication 2005-064970
  • a linear solenoid valve includes:
  • a spool that strokes to one side in an axis direction by conduction of current to a coil
  • control part for controlling the conduction of the current to the coil
  • an oil pressure in a hydraulic circuit is controlled by adjusting a discharge amount of an oil from a pressure adjusting port communicating with the hydraulic circuit by the spool that strokes in the axis direction,
  • control part includes:
  • the spool vibrates by a small amount in the axis X direction at a cycle longer than that before the oscillation frequency is changed. Consequently, the moving three of the spool increases after the oscillation frequency is changed as compared with that before the change. Therefore, it is possible to push out the deposited foreign substances with the increased moving force of the spool, and thereby the removing of the deposited foreign substances can be more surely performed.
  • FIG. 1 is an explanatory view of a schematic configuration of a pressure control valve.
  • FIG. 2 is a flow chart for explaining a process at the time of the execution of a foreign substance removing operation.
  • FIG. 3 is a flow chart for explaining a process at the time of the execution of the foreign substance ring operation.
  • FIG. 4 is an explanatory view of an output waveform of a command value of current conducted to a coil and a waveform of a dither current.
  • FIG. 1 is an explanatory view of a schematic configuration of the pressure control valve 1 configured by a two-way linear solenoid valve.
  • the pressure control valve 1 includes a spool 11 that strokes to one side (right side in FIG. 1 ) in the direction of an axis X due to the conduction of current to a coil 12 , a spring 13 (urging member) that urges the spool 11 to the other side (left side in FIG. 1 ) in the direction of the axis X, and a control device 20 (control part) for controlling the conduction of current to the coil 12 .
  • the pressure control valve 1 further includes a pressure adjusting port 15 that communicates with the hydraulic circuit 100 and a drain port 16 that discharges oil flowing in from the pressure adjusting port 15 .
  • This pressure control valve 1 is provided to control the pressure (hereinafter, also referred to as an oil pressure P) of an oil OL inside the hydraulic circuit 100 to a desired pressure.
  • the pressure control valve 1 when the spool 11 moves in a direction away from the pressure adjusting port 15 by the conduction of current to the coil 12 , the oil OL inside the hydraulic circuit 100 is discharged to a pressure control valve 1 side in accordance with the opening amount of the pressure adjusting port 15 , and when the conduction of the current to the coil 12 is completed, by the urging force of the spring 13 , the spool 11 moves to a position at which the pressure adjusting port 15 is closed, and then the discharging of the oil OL from the pressure adjusting port 15 is completed.
  • the spool 11 of the pressure control valve 1 is configured to move forward and backward in the axis X direction by the switching of the conduction/stop of the current to the coil 12 .
  • the control device 20 controls the moving amount and moving period of the spool 11 to adjust the discharge amount of the oil from the pressure adjusting port 15 , and thereby the pressure (oil pressure P) of the oil OL flowing through the hydraulic circuit 100 is adjusted to a desired pressure.
  • the control device 20 controls the command value It of the current conducted to the coil 12 with time so as to achieve the determined target pressure Pt.
  • the pressure control valve 1 since the movement of the spool 11 to one side in the axis X direction is performed by using a magnetic force generated by the conduction of the current to the coil 12 , foreign substances such as metal powder included in the oil are deposited inside or around the pressure adjusting port 15 due to the attraction of a residual magnetic force. The deposited foreign substances prohibit the movement of the spool 11 in the axis X direction or the closing of the pressure adjusting port 15 by the spool 11 . In this case, the adjustment of the pressure to the target pressure Pt is inhibited.
  • an operation mode foreign substance removing operation for the stroking of the spool 11 to remove the deposited foreign substances is therefore prepared for occurrence of pressure adjusting fault caused by the depositing of the foreign substances.
  • the control device 20 includes a determination unit 201 for determining the start of the foreign substance removing operation, a command value setting unit 202 for setting the command value. It for the current conducted to the coil 12 , and a dither current setting unit 203 for setting a dither current Id superimposed on the command value it for the current.
  • FIG. 2 and FIG. 3 each are a flow chart for explaining a process of the control device 20 at the time of the execution of the foreign substance removing operation.
  • FIG. 4 is an explanatory view of an output waveform of the command value It for the current conducted to the coil 12 and a waveform of the dither current superimposed on the command value It, at the time of the foreign substance removing operation.
  • FIG. 4( a ) is an explanatory view of the output waveform of the command value It of the current when the foreign substance removing operation is performed in a state in which the reduction of the oil pressure P is allowed.
  • FIG. 4 is an explanatory view of an output waveform of the command value It for the current when the foreign substance removing operation is performed in a state in which the reduction of the oil pressure P is allowed.
  • FIG. 4( b ) is an explanatory view of the output waveform of the command value It of the current when the foreign substance removing operation is performed in a state in which the reduction of the oil pressure P is not allowed.
  • FIG. 4( c ) to FIG. 4( e ) each are an explanatory view of the controlling of the dither current Id when the foreign substance removing operation is performed in a state in which the reduction of the oil pressure P is not allowed.
  • FIG. 4( c ) is an explanatory view when the oscillation frequency of the dither current Id is changed.
  • FIG. 4( d ) is an explanatory view when the amplitude of the dither current Id is changed.
  • FIG. 4( e ) is an explanatory view when both of the oscillation frequency and the amplitude of the dither current Id are changed.
  • the series of processes ( FIG. 2 , FIG. 3 ) for the operation of the removing of the foreign substances (foreign substance removing operation) by the spool 11 are executed during the regular operation control of the spool 11 by the control device 20 , when the determination unit 201 determines that the foreign substance removing operation by the spool 11 is necessary.
  • the determination unit 201 determines the necessity of the start of the foreign substance removing operation performed by the spool 11 .
  • the actual pressure Pr of the oil OL flowing through the hydraulic circuit 100 is reduced, and the difference ⁇ P between the actual pressure Pr and the target pressure Pt becomes large. Therefore, in the embodiment, when the reduction amount (difference ⁇ P) from the target pressure Pt of the pressure becomes the threshold Th 1 or greater, the start of the foreign substance removing operation is determined.
  • step S 101 When the start of the foreign substance removing operation is determined (step S 101 , Yes), in a step S 102 , the command value setting unit 202 outputs the command value It of the current conducted to the coin 12 in a mode at the time when the foreign substance removing operation of the spool 11 is performed.
  • step S 201 when the foreign substance removing operation of the spool 11 is started, in a step S 201 , the determination unit 201 determines whether the reduction of the oil pressure P in the hydraulic circuit 100 is in an allowed state or not.
  • the reduction of the oil pressure P in the hydraulic circuit 100 does not affect the operation of an automatic transmission, for example, when the oil pressure P in the hydraulic circuit 100 after pressure control by the pressure control valve 1 is not used for the fastening of a friction fastening element of the automatic transmission or a vehicle mounting the automatic transmission stops in a state in which an engine is driven, it is determined that the reduction of the oil pressure P is allowed. In addition, in a case of a state in which the reduction of the oil pressure P in the hydraulic circuit 100 affects the operation of the automatic transmission, such as a vehicle traveling state, it is determined that the reduction of the oil pressure P is not allowed.
  • step S 202 the dither current setting unit 203 sets the dither current Id superimposed on the command value It of the current conducted to the coil 12 .
  • the dither current setting unit 203 executes any of the following (A) to (C), and sets a changed dither current Id of which at least one of an oscillation frequency F and an amplitude W is different from that of the dither current Id at the current point in time.
  • the command value setting unit 202 executes the conduction of the current to the coil 12 while periodically increasing and reducing the command value It on which the changed oscillation frequency is superimposed.
  • the output waveform of the command value It of the current conducted to the coil 12 becomes a waveform alternately repeating the increasing and reducing at a predetermined cycle f within a predetermined range R (see FIG. 4( b ) ) while vibrating by a small amount.
  • the conduction of the current to the coil 12 is performed while the command value It on which the changed oscillation frequency is superimposed is periodically increased and reduced within the predetermined range R (see FIG. 4( b ) ).
  • the predetermined range R regulating the upper limit and the lower limit of the command value It is set to a range where the oil pressure P after the pressure control by the pressure control valve 1 does not become an oil pressure below a lower limit value at which the reduction of the oil pressure required at that time is allowed.
  • the predetermined range R in each target value (oil pressure P) of the oil pressure after the pressure control is regulated, and when the command value It is periodically changed in the step S 203 , the command value setting unit 202 reads one predetermined range R determined according to the target value (oil pressure F) of the oil pressure after the pressure control at that time from a storage part which is not shown in the drawings, and changes the command value It within the read predetermined range R.
  • step S 204 the command value setting unit 202 executes the conduction of the current to the coil 12 such that the command value It of the current conducted to the coil alternately repeats a maximum value I_max and a minimum value I_min of the command value It by every predetermined time. Consequently, the output waveform of the command value It of the current conducted to the coil 12 becomes a waveform alternately repeating the maximum value I_max and the minimum value I_min by every predetermined time (see FIG. 4 ( a ) ).
  • the determination unit 201 confirms whether the difference ⁇ P between the actual pressure Pr (actual oil pressure) of the oil OL flowing inside the hydraulic circuit 100 and the target pressure Pt of the oil pressure becomes lower than the threshold Th 1 or not.
  • step S 104 the determination unit 201 confirms whether the difference ⁇ P between the oil pressure P inside the hydraulic circuit 100 and the target pressure Pt of the oil pressure P is equal to or greater than a fail threshold Th 2 for determining an abnormality inside the hydraulic circuit 100 or not.
  • Th 2 for determining whether the occurrence of an abnormality is clearly in the hydraulic circuit 100 or not, it is confirmed just in case whether the reduction of the oil pressure P is clearly caused by the abnormality in the hydraulic circuit 100 or not.
  • step S 104 when the difference ⁇ P is equal to or greater than the fail threshold Th 2 (step S 104 , Yes), the process proceeds to the step S 105 , and the determination unit 201 executes a fail process for informing the abnormality in the hydraulic circuit 100 .
  • a warning light (not shown in the drawings) in an instrument panel is operated in a mode for informing the abnormality.
  • step S 104 when the difference ⁇ P is lower than the fail threshold Th 2 (step S 104 , No), the process is returned to the process of the step S 103 .
  • the process of the step S 103 and the process of the step S 104 are repeatedly executed until the difference ⁇ P becomes lower than the threshold Th 1 (step S 103 , Yes) or the difference ⁇ P becomes equal to or greater than the fail threshold Th 2 (step S 104 , Yes).
  • a pressure control valve 1 linear solenoid valve
  • a spool 11 that strokes to one side in an axis X direction by conduction of current to a coil 12 ;
  • a spring 13 urges the spool 11 to the other side in the axis X direction;
  • control device 20 for controlling the conduction of the current to the coil 12 ,
  • a pressure (oil pressure P) of an oil OL on a hydraulic circuit 100 side is controlled by adjusting the discharge amount of the oil OL from a pressure adjusting port 15 communicating with the hydraulic circuit 100 by the spool 11 that strokes in the axis X direction,
  • control device 20 includes:
  • the removing the deposited foreign substances can be performed without changing the oil pressure P of the hydraulic circuit 100 after the pressure control by the pressure control valve 1 .
  • the command value setting unit 202 periodically increases and reduces the command value It on which the changed oscillation frequency F is superimposed, within a predetermined range R between the maximum value I_max and the minimum value I_min of the command value lit.
  • the predetermined range R is set based on a discharge amount that is a discharge amount of the oil OL from the pressure adjusting port 15 and in which the pressure (oil pressure P) of the oil OL on the hydraulic circuit 100 side can be maintained at or greater than an allowable minimum oil pressure at that time.
  • the command value setting unit 202 After maintaining the command value It, on which the dither current Id in which the oscillation frequency F and/or the amplitude W is changed is superimposed, for a predetermined time, the command value setting unit 202 periodically increases and reduces the command value It within the predetermined range R between the maximum value I_max and the minimum value I_min of the command value (see FIG. 4( b ) ).
  • the spool 11 By maintaining the command value It at a constant value for a predetermined time, command value on which the dither current Id in which the oscillation frequency F and/or the amplitude V is changed is superimposed, before the command value It is periodically increased and reduced, the spool 11 can be made in a state of vibrating by a small amount. Consequently, the moving force of the spool 11 at the time when the increasing and reducing of the command value It starts can be maximized, and it is possible to push out the deposited foreign substances with the maximized moving force of the spool.
  • the determination unit 201 confirms whether the reduction of the oil pressure P is allowed or not when the start of the foreign substance removing operation is determined
  • the command value setting unit 202 periodically increases and reduces the command value It on which the changed oscillation frequency F is superimposed within the predetermined range R between the maximum value I_max and the minimum value I_min of the command value It, and
  • the command value setting unit 202 sets the command value It so as to alternately repeat the maximum value I_max and the minimum value I_min of the command value It by every predetermined time.
  • the command value It alternately repeating the maximum value I_max and the minimum value I_min by every predetermined time may be a command value It on which the dither current Id in which the oscillation frequency F and/or the amplitude W is changed is superimposed, or may be a command value It on which the dither current Id is not superimposed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Magnetically Actuated Valves (AREA)
  • Control Of Transmission Device (AREA)
US16/317,020 2016-07-12 2017-07-05 Linear solenoid valve Active 2037-07-18 US10712755B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2016-137212 2016-07-12
JP2016137212 2016-07-12
PCT/JP2017/024591 WO2018012357A1 (ja) 2016-07-12 2017-07-05 リニアソレノイドバルブ

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US20190227579A1 US20190227579A1 (en) 2019-07-25
US10712755B2 true US10712755B2 (en) 2020-07-14

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US (1) US10712755B2 (zh)
JP (1) JP6632091B2 (zh)
CN (1) CN109477593B (zh)
WO (1) WO2018012357A1 (zh)

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US20220181055A1 (en) * 2020-12-08 2022-06-09 Toyota Jidosha Kabushiki Kaisha Controller and control method for linear solenoid valve

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JP2022036328A (ja) * 2018-08-30 2022-03-08 ジヤトコ株式会社 バルブ検査装置及びバルブ検査方法
DE102019204724B3 (de) 2019-04-03 2020-10-01 Audi Ag Verfahren zum Betreiben eines Hydraulikventils einer Hydraulikeinrichtung einer Kraftfahrzeuggetriebeeinrichtung sowie Kraftfahrzeuggetriebeeinrichtung
CN112524259A (zh) * 2019-08-27 2021-03-19 章慧 一种防止介质流出且便于更换弹簧的电磁阀
JP7327273B2 (ja) * 2020-05-20 2023-08-16 トヨタ自動車株式会社 車載部品の異常箇所特定方法、車載部品の異常箇所特定システム、車載部品の異常箇所特定装置、車載部品の異常箇所通知制御装置、および車両用制御装置
KR20220000711A (ko) 2020-06-26 2022-01-04 현대자동차주식회사 변속기 유압제어 방법

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US20190227579A1 (en) 2019-07-25
JPWO2018012357A1 (ja) 2019-03-28

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